Evidence for pi-stacking as a source of stereocontrol in the synthesis of the core pyranochromene ring system common to calyxin I, calyxin J, and epicalyxin J.
Evidence for pi-stacking as a source of stereocontrol in the synthesis of the core pyranochromene ring system common to calyxin I, calyxin J, and epicalyxin J.
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DOI:
10.1021/jo901436u
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发表时间:
2009-10-02
期刊:
影响因子:
--
通讯作者:
Mead KT
中科院分区:
文献类型:
--
作者:
Cakir SP;Stokes S;Sygula A;Mead KT
A diastereoselective synthesis of the tetrahydropyranochromene ring system common to several natural product isolates of Alpinia blepharocalyx is reported. We have shown that a stereochemical preference exists for a syn configuration between the anomeric aryl substituents, representative of the C-7 and C-7′ substituents in the natural products. Further, our results show that stereocontrol is under kinetic control, and calculations suggest that a favorable π-stacking interaction may be the source of this stereocontrol.
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